5i3 



£breSj placed in regular order ; thefe again are turniflied 

 on each fide with finer fibres. When the animal with- 

 drew its tentacida it became fomewhat convoluted, as 

 the fibres clofed, and turned a little fpiral up the flalk : 

 their colour pale yellow, or yellowifli-white, the fibres, 

 ox pinncE, annulated with pink, fia as to fiarm regular, 

 femi-circular lines, when the plumes were fpread. 



*#* CONCAMERATED. 



15. 

 Serpula Nautiloides. Gmel. Syjl. p. 3739? Lobati. 



Turt. Lin. iv. p. 602 ? 

 Nautilus lobatulus. Ti^rt. Lin. iv. p. 307. 



Adams Microfc. t. 14 f 36. 



J'Valk. Min. Shells, f. 7 1 . 



S. with a comprefled, fpiral, lobated (liell ; fhape va- 

 rious, fismetimes roundifii, others oblong; above con- 

 vex ; with fix, fi^ven, or eight lobes : beneath flat ; the 

 interior volution only marked by one or tv/o fmall ele- 

 vations, and frequently not vifible: colour v/hite, or 

 yellowifli : aperture minutely fmall, fcarce definable. 

 Diameter barely one line. 



This fpecies has much the habit of a Nautilus, the in- 

 terior part being divided into unequal, parallel conca- 

 merations, 



V V V 2 We 



